ViewTube

The 1980 Atari VCS version quadrupled sales of the VCS, thereby becoming the first killer app for video game consoles.

Wizard of Wor, by Champ Games. 2018 Portland Retro Gaming Expo AtariAge booth.

... home computer in an 8-bit era”, specifically the legendary 6502 processor, the Atari 2600 VCS, and early Atari home computers.